By crashcourse - http://www.youtube.com/watch?v=leHy-Y_8nRs - Hank describes the desperate need many organisms have for nutrients (specifically nitrogen and bas.org.bd phosphorus) and how they go about getting them via the nitrogen and phosphorus cycles.

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Videos in "Ecology 101" category

The Hydrologic and Carbon Cycles: Always Recycle! - Crash Course #8

By crashcourse - http://www.youtube.com/watch?v=2D7hZpIYlCA - Hank introduces us to biogeochemical cycles by describing his two favorites: carbon and water. The hydrologic cycle describes how water moves on, above, and below the surface of the Earth, driven by energy supplied by the sun and wind. The carbon cycle does the same... for carbon!

The History of Life on Earth - Crash Course #1

by crashcourse - http://www.youtube.com/watch?v=sjE-Pkjp3u4 - The History of Life on Earth - with Hank Green. We\\\'ll be learning how the living things interact with and influence each other and their environments. Life is powerful, and in order to understand how living systems work, you first have to understand how they originated, developed an...

Population Ecology - Crash Course #2

By crashcourse - http://www.youtube.com/watch?v=RBOsqmBQBQk -Population ecology is the study of groups within a species that interact mostly with each other, and it examines how they live together in one geographic area to understand why these populations are different in one time and place than they are in another. How is that in any way useful to...

Pollution: Crash Course #11

By crashcourse - http://www.youtube.com/watch?v=kdDSRRCKMiI - Hank talks about the last major way humans are impacting the environment in this penultimate episode of Crash Course Ecology. Pollution takes many forms - from the simplest piece of litter to the more complex endocrine distruptors - and ultimately, humans are responsible for it all.

By crashcourse - http://www.youtube.com/watch?v=leHy-Y_8nRs - Hank describes the desperate need many organisms have for nutrients (specifically nitrogen and phosphorus) and how they go about getting them via the nitrogen and phosphorus cycles.

Human Population Growth - Crash Course #3

By crashcourse - http://www.youtube.com/watch?v=E8dkWQVFAoA - If being alive on Earth were a contest, humans would win it hands down. We\\\\\\\'re like the Michael Phelps of being alive, but with 250,000 times more gold medals. Today Hank is here to tell us the specifics of why and how human population growth has happened over the past hundred and ...

Human Impacts on the Environment: - Ecology Crash Course #10

by crashcourse - http://www.youtube.com/watch?v=5eTCZ9L834s - 5 Human Impacts on the Environment: Crash Course Ecology with Hank Green. Hank gives the run down on the top five ways humans are negatively impacting the environment and having detrimental effects on the valuable ecosystem services which a healthy biosphere provides.

Ecosystem Ecology: Links in the Chain - Crash Coursey #7

By crashcourse - http://www.youtube.com/watch?v=v6ubvEJ3KGM - Hank brings us to the next level of ecological study with ecosystem ecology, which looks at how energy, nutrients, and materials are getting shuffled around within an ecosystem (a collection of living and nonliving things interacting in a specific place), and which basically comes down t...

Ecological Succession: Change is Good - Crash Course #6

by crashcourse - http://www.youtube.com/watch?v=jZKIHe2LDP8 - In the world of ecology, the only constant is change - but change can be good. Today Hank explains ecological succession and how ecological communities change over time to become beautiful, biodiverse mosaics.

Conservation and Restoration Ecology: Crash Course #12

by crashcourse - http://www.youtube.com/watch?v=Kaeyr5-O2eU - Hank wraps up the Crash Course on ecology by taking a look at the growing fields of conservation biology and restoration ecology, which use all the kung fu moves we\\\\\\\'ve learned about in the past eleven weeks and apply them to protecting ecosystems and to cleaning up the messes that...